Lunéa Paris · Sizing
Find your ring size,
right on this screen.
Calibrate your screen once, then measure a ring you already own — or your finger — to get an exact size in seconds. Nothing leaves your device.
Calibrate your screen
Hold a credit card or a US quarter flat against your screen and adjust the slider until the outline below matches its edges exactly. This makes every measurement that follows accurate to real-world millimetres.
Tip — set your browser zoom to 100%, keep the card flat against the screen with no case, and view it straight on rather than at an angle.
diag: viewport —px · dpr — · zoom — · px/mm — · touch —
Place your ring — or measure your finger
Lay a ring you already own flat on the screen. Use the slider until the gold circle matches your ring's inner edge.
Place ring · match the inner edge
Use ← → arrow keys for fine adjustment
Wrap a thin strip of paper around your finger, mark where the ends meet, then lay it flat below — start at 0 and drag the marker to your mark.
Ruler in millimetres · line up the strip's start at 0
Your ring size
Based on your measurement just now.
Between two sizes, or choosing an eternity band or wide setting? We generally recommend sizing up by half a size for comfort.
Not sure, or sizing for someone else? Our concierge team is happy to help — get in touch.
Size conversion, at a glance
| US | UK | EU | Diameter (mm) | Circumference (mm) |
|---|---|---|---|---|
| 5 | J | 49 | 15.7 | 49.3 |
| 6 | L | 51.5 | 16.5 | 51.9 |
| 7 | N | 54 | 17.3 | 54.4 |
| 8 | P | 57 | 18.1 | 57.0 |
| 9 | R | 59 | 19.0 | 59.5 |
| 10 | T | 62 | 19.8 | 62.1 |
| 11 | V | 64 | 20.6 | 64.6 |
| 12 | X | 66.5 | 21.4 | 67.2 |